LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Receivables Related Risk Rating Excluding Purchased Impaired Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 5,671,462	$ 5,345,996	$ 3,039,368
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,148,118	3,824,483	$ 2,163,705
Commercial [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	484,768	341,280
Commercial [Member] | Commercial Real Estate - Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	860,086	875,443
Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,618,605	1,509,159
Commercial [Member] | Raw Land and Lots [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	195,665	211,225
Commercial [Member] | Single Family Investment Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	429,489	412,494
Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	467,613	393,776
Commercial [Member] | Other Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	91,892	81,106
Excluding Receivables Acquired With Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,082,708	3,730,248
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | 0-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,047,347
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | 1-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income		805,908
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | 4 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,845,364	2,662,344
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | 5 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	81,426	89,056
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | 6 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	52,852	63,672
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | 7 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	53,688	$ 109,268
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | 8 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,031
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	483,364	$ 337,498
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Construction Loans [Member] | 0-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	43,656
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Construction Loans [Member] | 1-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income		22,512
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Construction Loans [Member] | 4 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	409,249	289,064
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Construction Loans [Member] | 5 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	21,725	11,932
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Construction Loans [Member] | 6 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	6,497	10,906
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Construction Loans [Member] | 7 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 2,237	$ 3,084
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Construction Loans [Member] | 8 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 832,698	$ 844,276
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] | 0-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	213,547
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] | 1-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income		185,789
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] | 4 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	587,432	620,587
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] | 5 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13,642	15,003
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] | 6 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,214	7,688
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] | 7 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	8,931	$ 15,209
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] | 8 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,932
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,603,477	$ 1,480,290
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | 0-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	493,723
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | 1-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income		356,263
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | 4 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,075,433	1,041,515
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | 5 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	14,606	22,358
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | 6 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	10,223	28,388
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | 7 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 9,492	$ 31,766
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | 8 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Raw Land and Lots [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 191,141	$ 203,798
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Raw Land and Lots [Member] | 0-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	15,728
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Raw Land and Lots [Member] | 1-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income		11,162
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Raw Land and Lots [Member] | 4 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	127,427	128,281
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Raw Land and Lots [Member] | 5 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,526	16,803
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Raw Land and Lots [Member] | 6 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	15,689	4,783
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Raw Land and Lots [Member] | 7 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 24,771	$ 42,769
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Raw Land and Lots [Member] | 8 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Single Family Investment Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 415,118	$ 395,615
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Single Family Investment Real Estate [Member] | 0-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	55,812
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Single Family Investment Real Estate [Member] | 1-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income		59,638
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Single Family Investment Real Estate [Member] | 4 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	340,708	311,900
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Single Family Investment Real Estate [Member] | 5 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,061	9,750
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Single Family Investment Real Estate [Member] | 6 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,362	6,680
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Single Family Investment Real Estate [Member] | 7 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 4,175	$ 7,647
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Single Family Investment Real Estate [Member] | 8 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 465,762	$ 389,921
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial and Industrial [Member] | 0-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	180,478
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial and Industrial [Member] | 1-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income		138,973
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial and Industrial [Member] | 4 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	262,377	230,084
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial and Industrial [Member] | 5 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13,943	9,392
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial and Industrial [Member] | 6 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,435	4,383
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial and Industrial [Member] | 7 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,430	$ 7,089
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Commercial and Industrial [Member] | 8 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	99
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Other Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	91,148	$ 78,850
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Other Commercial [Member] | 0-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	44,403
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Other Commercial [Member] | 1-3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income		31,571
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Other Commercial [Member] | 4 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	42,738	40,913
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Other Commercial [Member] | 5 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,923	3,818
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Other Commercial [Member] | 6 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	432	844
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Other Commercial [Member] | 7 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 652	$ 1,704
Excluding Receivables Acquired With Deteriorated Credit Quality [Member] | Commercial [Member] | Other Commercial [Member] | 8 [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Net of Deferred Income